Similar symptoms as above. Occasionally printing PJL codes at the first
page, before queue useful data. After this "garbage" page, the queue
printing as expected.

Printer:
    HP-LaserJet-5100
    Printer work as local and network shared.
    Printer connected through LPT-USB "noname" adapter.

System:
    Linux 3.5.0-26-generic #40-Ubuntu SMP Tue Feb 26 19:57:24 UTC 2013 x86_64 
x86_64 x86_64 GNU/Linux
    Distributor ID:     Ubuntu
    Description:        Ubuntu 12.10
    Release:    12.10
    Codename:   quantal

CUPS:
    1.6.2-1ubuntu3

Printer worked fine with CUPS 1.5.3, PJL codes appeared after update to
1.6.x

After reading this topic, made some changes:
    echo blacklist usblp > /etc/modprobe.d/blacklist-usblp.conf
    rmmod usblp

Done some tests, so far no errors.
Logs in attach, but they have been written after blacklisting usblp. Sorry: 
work machine, haven't much time for debugging. By the way, I haven't notice any 
appropriate errors in logs before. May be, need to change debug level?


** Attachment added: "logs.7z"
   
https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1000253/+attachment/3605653/+files/logs.7z

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https://bugs.launchpad.net/bugs/1000253

Title:
  Brother HL-1440 printing extra page with PJL codes

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